18064338478 has 8 divisors (see below), whose sum is σ = 27115880400. Its totient is φ = 9025711680.

The previous prime is 18064338473. The next prime is 18064338491. The reversal of 18064338478 is 87483346081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18064338473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3225283 + ... + 3230878.

It is an arithmetic number, because the mean of its divisors is an integer number (3389485050).

Almost surely, 2^18064338478 is an apocalyptic number.

18064338478 is a deficient number, since it is larger than the sum of its proper divisors (9051541922).

18064338478 is a wasteful number, since it uses less digits than its factorization.

18064338478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457562.

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 18064338478 in words is "eighteen billion, sixty-four million, three hundred thirty-eight thousand, four hundred seventy-eight".